Test Preparation on Science Olympiad Class-6 Test Prep-4

An oily thin paper will be

Rita moves on a straight road from point A to point C. She takes 20 minutes to cover a certain distance AB and 30 minutes to cover the rest of the distance BC. She then turns back and takes 30 minutes to cover the distance CB and 20 minutes to cover the rest of the distance to her starting point. She makes 5 rounds on the road the same way. Rita concludes that her motion is

An inverted image is the characteristic of a ________.

The North Pole of a magnet can be identified by

Choose the opaque object from the following